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drm/amdgpu: Process any VBIOS RAS EEPROM address

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We can now process any RAS EEPROM address from
VBIOS. Generalize so as to compute the top three
bits of the 19-bit EEPROM address, from any byte
returned as the "i2c address" from VBIOS.

Cc: John Clements <john.clements@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Cc: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Luben Tuikov 2021-08-25 13:50:20 -04:00 committed by Alex Deucher
parent a6a355a22f
commit cc947bf91b
1 changed files with 13 additions and 12 deletions
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25
drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
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@ -114,21 +114,22 @@ static bool __get_eeprom_i2c_addr_arct(struct amdgpu_device *adev,
static bool __get_eeprom_i2c_addr(struct amdgpu_device *adev,
struct amdgpu_ras_eeprom_control *control)
{
u8 i2c_addr;
if (!control)
return false;
control->i2c_address = 0;
if (amdgpu_atomfirmware_ras_rom_addr(adev, (uint8_t*)&control->i2c_address))
{
if (control->i2c_address == 0xA0)
control->i2c_address = 0;
else if (control->i2c_address == 0xA8)
control->i2c_address = 0x40000;
else {
dev_warn(adev->dev, "RAS EEPROM I2C address not supported");
return false;
}
if (amdgpu_atomfirmware_ras_rom_addr(adev, &i2c_addr)) {
/* The address given by VBIOS is an 8-bit, wire-format
* address, i.e. the most significant byte.
*
* Normalize it to a 19-bit EEPROM address. Remove the
* device type identifier and make it a 7-bit address;
* then make it a 19-bit EEPROM address. See top of
* amdgpu_eeprom.c.
*/
i2c_addr = (i2c_addr & 0x0F) >> 1;
control->i2c_address = ((u32) i2c_addr) << 16;
return true;
}